5/3/15 11:46 AM SAS Output
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Fall 2008 and Fall 2009 Combined Regression Analysis MALES The REG Procedure
Model: MODEL1
Dependent Variable: CHEMDEG CHEMDEG
Number of Observations Read 225
Number of Observations Used 167
Number of Observations with Missing Values 58
Maximum R-Square Improvement: Step 1
Variable ONEMATH Entered: R-Square = 0.3373 and C(p) = 20.0940
Analysis of Variance
Source DF SquaresSum of SquareMean F Value Pr > F Model 1 11.53693 11.53693 83.98 <.0001
Error 165 22.66667 0.13737
Corrected Total 166 34.20359
Variable ParameterEstimate StandardError Type II SS F Value Pr > F Intercept 4.44089E-16 0.08288 3.9443E-30 0.00 1.0000
ONEMATH 0.80952 0.08834 11.53693 83.98 <.0001
Bounds on condition number: 1, 1
The above model is the best 1-variable model found.
Maximum R-Square Improvement: Step 2
Variable RESEARCH Entered: R-Square = 0.3795 and C(p) = 10.4435
Analysis of Variance
SAS Output (cont.) 5/3/15 11:46 AM SAS Output Page 2 of 7 file:///Users/gretchenadams/Library/Caches/TemporaryItems/Outlook%20Temp/Males%20V2%20SAS%20Results.htm Model 2 12.97923 6.48962 50.15 <.0001 Error 164 21.22436 0.12942 Corrected Total 166 34.20359
Variable ParameterEstimate StandardError Type II SS F Value Pr > F Intercept 4.62771E-16 0.08044 4.28314E-30 0.00 1.0000
RESEARCH 0.22436 0.06721 1.44231 11.14 0.0010
ONEMATH 0.75000 0.08757 9.49219 73.35 <.0001
Bounds on condition number: 1.0432, 4.173
The above model is the best 2-variable model found.
Maximum R-Square Improvement: Step 3
Variable FIRSTGPA Entered: R-Square = 0.4045 and C(p) = 5.5344
Analysis of Variance
Source DF SquaresSum of SquareMean F Value Pr > F Model 3 13.83457 4.61152 36.90 <.0001
Error 163 20.36902 0.12496
Corrected Total 166 34.20359
Variable ParameterEstimate StandardError Type II SS F Value Pr > F Intercept -0.37839 0.16482 0.65862 5.27 0.0230
FIRSTGPA 0.13207 0.05048 0.85534 6.84 0.0097
RESEARCH 0.19800 0.06680 1.09781 8.79 0.0035
ONEMATH 0.71379 0.08716 8.38094 67.07 <.0001
Bounds on condition number: 1.0702, 9.5983
SAS Output (cont.)
5/3/15 11:46 AM SAS Output
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Maximum R-Square Improvement: Step 4
Variable SUBURB Entered: R-Square = 0.4220 and C(p) = 2.6967
Analysis of Variance
Source DF SquaresSum of SquareMean F Value Pr > F Model 4 14.43347 3.60837 29.57 <.0001 Error 162 19.77012 0.12204 Corrected Total 166 34.20359 Variable Parameter Estimate Standard
Error Type II SS F Value Pr > F Intercept -0.49929 0.17178 1.03096 8.45 0.0042
FIRSTGPA 0.13312 0.04989 0.86893 7.12 0.0084
RESEARCH 0.19127 0.06609 1.02229 8.38 0.0043
SUBURB 0.13869 0.06261 0.59889 4.91 0.0281
ONEMATH 0.73122 0.08649 8.72251 71.47 <.0001
Bounds on condition number: 1.0792, 16.881
The above model is the best 4-variable model found.
Maximum R-Square Improvement: Step 5
Variable URM Entered: R-Square = 0.4253 and C(p) = 3.7743
Analysis of Variance Source DF Sum of Squares Mean Square F Value Pr > F Model 5 14.54765 2.90953 23.83 <.0001 Error 161 19.65594 0.12209 Corrected Total 166 34.20359 Variable Parameter Estimate Standard
Error Type II SS F Value Pr > F Intercept -0.56690 0.18549 1.14029 9.34 0.0026
SAS Output (cont.) 5/3/15 11:46 AM SAS Output Page 4 of 7 file:///Users/gretchenadams/Library/Caches/TemporaryItems/Outlook%20Temp/Males%20V2%20SAS%20Results.htm RESEARCH 0.18857 0.06616 0.99177 8.12 0.0049 URM 0.08744 0.09041 0.11419 0.94 0.3349 SUBURB 0.13989 0.06263 0.60910 4.99 0.0269 ONEMATH 0.73911 0.08689 8.83317 72.35 <.0001
Bounds on condition number: 1.0887, 26.348
The above model is the best 5-variable model found.
Maximum R-Square Improvement: Step 6
Variable NUMBERAP Entered: R-Square = 0.4268 and C(p) = 5.3640
Analysis of Variance
Source DF SquaresSum of SquareMean F Value Pr > F Model 6 14.59845 2.43308 19.86 <.0001
Error 160 19.60514 0.12253
Corrected Total 166 34.20359
Variable ParameterEstimate StandardError Type II SS F Value Pr > F Intercept -0.54609 0.18862 1.02708 8.38 0.0043 FIRSTGPA 0.11923 0.05191 0.64649 5.28 0.0229 RESEARCH 0.17876 0.06801 0.84656 6.91 0.0094 URM 0.08378 0.09075 0.10443 0.85 0.3573 NUMBERAP 0.00815 0.01266 0.05080 0.41 0.5206 SUBURB 0.12057 0.06955 0.36820 3.00 0.0849 ONEMATH 0.73423 0.08738 8.65174 70.61 <.0001
Bounds on condition number: 1.4058, 42.26
The above model is the best 6-variable model found.
SAS Output (cont.)
5/3/15 11:46 AM SAS Output
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Variable MATHCRSE Entered: R-Square = 0.4277 and C(p) = 7.1074
Analysis of Variance Source DF Sum of Squares Mean Square F Value Pr > F Model 7 14.63022 2.09003 16.98 <.0001 Error 159 19.57337 0.12310 Corrected Total 166 34.20359 Variable Parameter Estimate Standard
Error Type II SS F Value Pr > F Intercept -0.53774 0.18977 0.98842 8.03 0.0052 FIRSTGPA 0.11954 0.05203 0.64975 5.28 0.0229 MATHCRSE -0.01459 0.02873 0.03177 0.26 0.6121 RESEARCH 0.18202 0.06847 0.87000 7.07 0.0087 URM 0.09341 0.09292 0.12442 1.01 0.3163 NUMBERAP 0.01097 0.01385 0.07724 0.63 0.4295 SUBURB 0.12931 0.07181 0.39920 3.24 0.0736 ONEMATH 0.74965 0.09269 8.05265 65.41 <.0001
Bounds on condition number: 1.7307, 65.133
The above model is the best 7-variable model found.
Maximum R-Square Improvement: Step 8
Variable CHEMCOMB Entered: R-Square = 0.4281 and C(p) = 9.0000
Analysis of Variance Source DF Sum of Squares Mean Square F Value Pr > F Model 8 14.64351 1.83044 14.79 <.0001 Error 158 19.56008 0.12380 Corrected Total 166 34.20359 Variable Parameter Estimate Standard
SAS Output (cont.) 5/3/15 11:46 AM SAS Output Page 6 of 7 file:///Users/gretchenadams/Library/Caches/TemporaryItems/Outlook%20Temp/Males%20V2%20SAS%20Results.htm Intercept -0.48931 0.24096 0.51048 4.12 0.0440 FIRSTGPA 0.11885 0.05222 0.64118 5.18 0.0242 MATHCRSE -0.01171 0.03012 0.01872 0.15 0.6979 RESEARCH 0.18175 0.06867 0.86734 7.01 0.0089 URM 0.09393 0.09319 0.12577 1.02 0.3150 NUMBERAP 0.01111 0.01390 0.07915 0.64 0.4251 SUBURB 0.12973 0.07202 0.40171 3.24 0.0736 ONEMATH 0.74981 0.09295 8.05594 65.07 <.0001 CHEMCOMB -0.03017 0.09208 0.01329 0.11 0.7436
Bounds on condition number: 1.8918, 85.225
The above model is the best 8-variable model found.
APPENDIX I: IRB APPROVAL
Office of the Vice Chancellor for Research
Office for the Protection of Research Subjects 528 East Green Street
Suite 203 Champaign, IL 61820
U of Illinois at Urbana-Champaign • IORG0000014 • FWA #00008584 May 14, 2015
Gretchen Adams Chemistry
3671 Noyes Lab, Box A-2 501 S. Mathews Urbana, IL 61801 M/C: 712
RE: Factors that Lead to Retention and Recruitment of Chemistry Majors at the University of Illinois at Urbana-Champaign
IRB Protocol Number: 15829
EXPIRATION DATE: 05/13/2018
Dear Dr. Adams:
Thank you for submitting the completed IRB application form for your project entitled Factors that Lead
to Retention and Recruitment of Chemistry Majors at the University of Illinois at Urbana-Champaign.
Your project was assigned Institutional Review Board (IRB) Protocol Number 15829 and reviewed. It has been determined that the research activities described in this application meet the criteria for exemption at 45CFR46.101(b)(1, 2, & 4).
This determination of exemption only applies to the research study as submitted. Please note that additional modifications to your project need to be submitted to the IRB for review and exemption determination or approval before the modifications are initiated.
We appreciate your conscientious adherence to the requirements of human subjects research. If you have any questions about the IRB process, or if you need assistance at any time, please feel free to contact me at the OPRS office, or visit our website at http://www.irb.illinois.edu.
Sincerely,
Rebecca Van Tine, MS
Human Subjects Research Specialist, Office for the Protection of Research Subjects c: Lizanne DeStefano